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SEQUOIA ANALYTICAL <br /> 819 Striker Avenue Suite 8 • Sacramento CA 95834 <br /> (916) 921 9600 • FAX (916) 921 0100_ <br /> Brown & Caldwell Client Project ID Arco 434-93-5 Lodi Sampled Dec 7 190 <br /> P Q Box 13449 Sample Matrix Air Received Dec 8 1993 <br /> Sacramento CA 95813-3449 Analysis Method EPA 5030/8015/8020 Reported Dec 10 1993 <br /> Attention Mindy Wright First Sample # 312-0309 <br /> TOTAL PURGEABLE PETROLEUM HYDROCARBONS with BTEX DISTINCTION <br /> Reporting Sample Sample <br /> Anaiyte Limit I D I D <br /> mg/ 312-0309 312-0310 <br /> cubic m Cat OX Cat OX <br /> Influent Effluent <br /> urgeab e <br /> Hydrocarbons 5 0 950 74 <br /> Benzene 0 050 N D N D <br /> Toluene 0 050 15 N D <br /> Ethyl Benzene 0 050 14 N D <br /> Total Xylenes 0 050 150 N D • <br /> Chromatogram Pattern Gasoline -- <br /> Quality Control Data <br /> Report Limit Multiplication Factor 5o 10 <br /> Date Analyzed 12/8/93 12/8/93 <br /> Instrument Identification HP2 HP2 <br /> Surrogate Recovery, % 102 106 <br /> (CSC Limits = 70-130°/x) <br /> Purgeable Hydrocarbons are quantitated against a fresh gasoline standard <br /> Analytes reported as N 0 were not detected above the stated reporting limit <br /> SEQUOIA ANALYTICAL . <br /> 4L, a C Schneider <br /> Project Manager <br /> 3120309 BRS <1> <br />